Question 1039352
<b>Tim is three years older than his younger sister Kayla.<pre>T = K+3</pre>The sum of the two ages is 9.<pre>T+K = 9

Substitute K+3 for T

K+3+K = 9
 2K+3 = 9
   2K = 6
    K = 3

Kayla is K, and K = 3, so Kayla is 3.

Tim is T, or T = K+3 = 3+3 = 6, So Tim is 6.

Edwin</pre></b>